Rod-mill inlet and outlet control



Se t. 3, 1929. R, A, NORTH 1,726,917

ROD MILL INLET AND OUTLET CONTROL F-iled Sept. 24, 1927 3 Sheets-Sheet lLN-3.... up.

INVENTOR,

= W i I 3 Sheets-Sheet 2 Sept. 3, 1929. R. A. NORTH ROD MILL INLET ANDOUTLET CONTROL Filed Sept. 24, 1927 Sept. 3, 1929. NORTH 1,726,917

ROD MILL INLET AND OUTLET CONTROL Filed Sept. 24, 1927 3 sneets sheet 5Q to J w K: \k y [L '9 Q m i t r L 0 o ,rn

INVEN TOR.

Patented Sept. 3, 1929,

UNITED STATES RAY ADNA NORTH, OF GREEN BAY, WISCONSIN.

ROD-MILL INLET AND OUTLET CONTROL.

Application filed September 24, 1927. Serial No. 221,667.

The invention relates generally to improvements in rod mills forconvertlng fibrous materials into pulp, and more especially relates tothe inlet and outlet controls of the rod mills.

In the art of manufacturing paper pulp it has been discovered that thequality of stock from any rod mill depends on the rate of feed offibrous materials into the inlet of the mill, and likewise the dischargeo1 delivcry of the segregated fibrous materials, such as wood, cane orthe like, from said mill, especially this being so on screenings.Therefore, it is the aim of the present lnvention to provide inlet andoutlet controls to the'rod mill, whereby the feed and discharge offibrous materials-may be regulated to satisfy any and all conditions inthe operation of the mill to assure the proper density of pulp and bestquality at all times.

Another aim of the present invention is to provide quick and easyadjustment both at the inlet and outlet ends of the mill, whereby thefeed of the materials and the discharge of the same can be accomplishedwith certainty and a uniform density of pulp maintained at all times.

A further aim of the present invention is to materially simplify theinlet and outlet controls, so that the same can be installed withoutaltering to any great degree the make up of the rod mill, and to assureperfect operation at the instant of adjustment of the controls.

The invention accordingly consists in the features of construction,combination and arrangement of parts as will be hereinafter more fullydescribed, illustrated in the accompanying drawings showing thepreferred embodiment of the invention, and pointed out in the claimshereunto appended.

In the accompanying drawings:

Figure 1, is a side elevation fragmentarily longitudinally sectioned,showing the rod mill with the controls constructed in accordance withthe invention.

Figure 2, is a vertical transverse sectional elevation taken on the line22 of Figure 1.

Figure 3, is an end elevation along the line 33 of Figure 1, of theoutlet control.

Figure 4, is a vertical sectional view there of showing the closedposition of the gate.

Figure 5, is a view similar to Figure 4, showing the gate in openposition.

Figure 6, is a sectional view on the line 6-6 of Figure 1, showing theinlet control.

Figure 7, is an end elevation of the rod mill looking toward the inletend of the same.

Figure 8, is a fragmentary elevation look ing toward the outlet end ofthe rod mill.

Similar reference characters indicate cor responding parts throughoutthe several views in the drawings.

The mill illustrated in the drawings in detail comprises in general adrum or shell A, preferably of cylindrical form, having end heads 10,and 11, respectively, these being fitted to said drum or shell in anydesirable manner, while externally of the drum or shell at intervalslongitudinally thereof are reinforcing bars 12, which are made fast inany suitable way. The heads 10, and 11, are supported in trunnions 13,which are carried upon foundation sills 14, spaced apart and arranged atopposite ends of the mill.

Within the drum or shell A, is a liner composed of alternately arrangedseries of deep and shallow strips 15, and 16, respectively, these beinglongitudinally disposed in said drum or shell in close contact with eachother. while grouped within the latter is a plurality of freely tumblingdisintegrating rods 17, and 18, respectively, which extend substantiallythroughout the length of the distintegrating chamber B, formed by thedrum or shell A. The rods 17, are of less cross-sectional diameter thanthe rods 18, which enables a more thorough disintegrating action to behad in conjunction with the liner formed by the strips 15, and 16, in

their arrangement hereinbefore described.

Formed centrally of the head 10, is an outwardly tapered inlet 19, intowhich slightly" protrudes the inner end of a semi-cylindrical feedtrough 20, forming the bottom of a feed hopper 21, held by supports 22,the trough 20, being horizontally disposed and has located therein afeed-screw 23, which is coupled with the inlet 19, through the medium ofthe device 24, so that said screw 23, will rotate with the drum or shellA, as will be apparent. The device 24, permits the centering of thescrew 23, within the trough 20, and likewise with relation to the inlet19.

The mill is rotated by means of gears 25, peripherally formed on theheads 10, and 11, which gears mesh with pinions 26, on a driven shaft27, the latter being journaled in bearings 28, and this shaft carries agear 28, meshing with a pinion 29, on a power shaft 30, provided with abelt wheel 31, operated from any suitable source of power. It is ofcourse understood that the mill is operated at a relatively low speed.

Arranged within the hopper 2i, are opposed downwardly convergentadjustable controls in the form of shutters or gates 39., these beingslidably fitted in guides 33, and are provided with loop handles 34, sothat the same can be manually shifted to increase or decrease the feedof materials from the hopper 21, to the trough 20, thereby regulatingthe quantity of materials admitted to the drum or shell A.

Centrally of the head 11. is an outlet 35, in which located an outletcontrol, comprising a funnel shaped mouth portion 36, and a flanged rim37, which latter fits snugly within the outlet 35, near its inner end.The inner end 38, ot the outlet is beveled to present an outward taperedportion there to. The mouth portion 36. is formed at its lowermostportion with a trough like channel 39, communicating directly with adischarge spout. 40, formed on and projecting outwardly from a cover orcap 41, secured to the trunnion 13, about the outlet 35, the cover orcap 41, being formed with an arched discharge way or opening 42,directly over the spout 40, through which the pulp'is delivered from themill.

Encircling the drum or shell A, intermediate its ends is an annulartrack 43, against which play flanged idle rollers 44, these beingjournaled in swinging bearings 45, reversely arranged and hinged by apivot 46, common to both bearings, upon a base member 47, arrangedbetween the sills 14. The base member 47, has fitted therein coiledtensioning springs 48, which work against the swinging bearings 45, tomaintain the rollers 44, constantly in contact with the track 43, uponthe drum or shell A.,'of the mill.

Overhanging the inner end of the channel 39, is a swinging gate 49,carrying a latch 50, which enables said gate to be fastened closed oropened. When the gate 49, is closed it reduces the discharge capacity ofthe mouth portion 36, of the outlet control. To enable the gate 49, tobe fastened open for increasing the discharge capacity of the outletcontrol there is provided a cross strut 51, over the channel 39, inadvance of the point of hinge mounting of said gate 49, so that thelatch 50, can engage with said strut, the latch being manually actuated.

The drum or shell A, on opposite sides of the track 43, is provided witha pair of longitudinally aligned discharge openings 52, nordrum or shellA,

mally closed by slidable covers or closures 53, these being supported inguides 54, on the exteriorly thereof. By opening the covers or'closures53, the drum or shell A, can be conveniently emptied orthe materialdispensed therefrom into receptacles 54, removably placed beneath thelatter.

In the operation of the mill, the wood chips which a re prelin'iinarilytreated in order to soften the same, are fed into the drum or shell A,from the hopper 21, the inletcontrol being regulated to assure theproper or required feed of material from said hopper. The chips areadmitted with liquid and due to their so't't condition, are subjected toa squeezing and rubbing action between the cascading rolling rods 1 and18, and their action with the strips 15, and 16, whereby' the fibers areeffectively separated without undesirably breaking or otherwise damagingthe same. As the chips advance through the disintegrating chamber B, andtoward the outlet, the segregated fibers are eventually discharged withthe required density through the outlet control into the delivery spout40, and thence from the mill, for ready subsequent utilization in themanufacture of paper pulp.

The inlet and outlet controls assure regulation of the required densityof the material within the mill during the operation of the same, aswill be clearly apparent.

It is to be understood that the invention is not to be limited to theexact details of construction and operation herein shown and describedfor variations and modifications within the scope of the claims may beresorted to and appear to those skilled in the art.

What is claimed is:

1. In a mill of the kind described, a revolving cylinder having anoutlet, an outlet control including a funnel shaped mouth piece fittedin the outlet and having a flanged rim at the inner end of the latter, atrough formed at the lower portion of the mouth piece to provide achannel therein, a cover on the mouth piece and having a spout andopening coincident with the channel, and an adjustable gate shapedcorrespondingly to and overhanging channel.

2. In a mill of the kind described, a revolving drum having an outlet,an outlet control including a substantially funnel shaped mouth piecefitted in the outlet and having a flanged rim at the inner end thereof,a trough formed at the lower portion bf the mouth piece to provide achannel therein, a cover on the outer end of: the mouthpiece and havinga spout and opening coincident with the channel, an adjustable gateshaped correspondingly to and overhanging the inner end of the channel,and means for sustaining the gate in various adjusted positions toregulate the discharge capacity of the outlet control.

In testimony whereof I afiix my signature.

RAY Anna NORTH.

the inner end of the

